1. Introduction
Thank you for choosing the YUENZEE Smart Ring SY-02. This device is designed to seamlessly integrate into your daily life, offering advanced health monitoring and activity tracking capabilities. Please read this manual carefully to ensure proper use and to fully benefit from all its features.

Image 1: YUENZEE Smart Ring SY-02. A sleek, black smart ring with internal sensors visible, designed for discreet wear.
2. Setup Guide
Follow these three simple steps to set up your YUENZEE Smart Ring SY-02.

Image 2: Visual guide showing the three setup steps: App download, App settings, and Ring wearing.
2.1. App Download
Before use, download the dedicated application, "RWFIT", to your smartphone. The app is compatible with both Android (5.1 and above) and iOS (8.0 and above) devices.
2.2. App Settings
- Launch the RWFIT application.
- Select "New Registration" or "Login to use". If you wish to skip, tap "Skip".
- Ensure your smartphone's communication function (Bluetooth) is enabled.
- From "My Devices" within the app, select "SY01" or "SY02" to pair your smart ring.
2.3. Wearing the Ring
Wear the smart ring on the appropriate finger. Once worn, automatic measurement of your health data will begin. For optimal accuracy, ensure the ring fits snugly but comfortably.

Image 3: The YUENZEE Smart Ring SY-02 worn on a finger, demonstrating its discreet design.
3. Operating Instructions
3.1. 24-Hour Health Monitoring
The YUENZEE Smart Ring SY-02 provides continuous health monitoring to keep you informed about your physical condition.
- Sleep Cycle Analysis: Detailed analysis of your sleep cycles (deep sleep, light sleep, REM sleep) to maximize your refreshed feeling upon waking.
- Blood Oxygen Saturation (SpO2): Real-time tracking of blood oxygen levels.
- Heart Rate: Real-time monitoring of your heart rate.
- Stress Level: Visualization of your daily stress levels to support improvements in healthy habits.

Image 4: Screenshot of the RWFIT app displaying detailed sleep monitoring data, including deep sleep, light sleep, and awake times.
3.2. Activity Tracking
The smart ring accurately records your exercise data in real-time, supporting an efficient fitness routine.
- Steps: Counts your daily steps.
- Calories: Estimates calories burned.
- Distance: Measures the distance covered.
- Multiple Sports Modes: Records exercise volume in 8 different sports modes, including running and yoga.

Image 5: App interface showing real-time activity data, including steps, calories, and distance, with various sports icons.
3.3. Smart Gesture Control
The smart ring offers convenient gesture controls for various smartphone functions.
- Camera Shutter: Control your smartphone's camera shutter with a simple gesture.
- SNS Operation: Perform actions on social media applications.
- Video Switching: Double-tap with your fingertip to switch videos.

Image 6: A hand wearing the smart ring, demonstrating how a double-tap gesture can control a smartphone application, such as switching videos on TikTok.
3.4. Water Resistance
The YUENZEE Smart Ring SY-02 features IP68 and 5ATM water resistance, allowing for worry-free use in various situations.
- Water Depth: Resistant up to 50 meters.
- Usage: Suitable for swimming in pools, showering, and bathing in hot springs.
- Daily Activities: Functions reliably during daily water-related tasks and in adverse weather conditions.

Image 7: The smart ring submerged in water, illustrating its IP68+5ATM waterproof rating, with additional images showing use during dishwashing, hand washing, and swimming.
4. Maintenance
4.1. Charging
The smart ring features a long-lasting battery, significantly reducing the hassle of frequent charging.
- Battery Life: Approximately 5 days of use on a single charge (may vary depending on usage conditions).
- Charging Time: Approximately 1.5 hours.
- Charging Method: USB magnetic charging.
This extended battery life ensures continuous health management even during travel or business trips, without the need to carry a charger.
4.2. Cleaning
To maintain hygiene and optimal performance, regularly clean your smart ring.
- Wipe the ring with a soft, damp cloth.
- Avoid using harsh chemicals or abrasive materials, as these may damage the finish or sensors.
- Ensure the charging contacts are clean and dry before charging.
5. Troubleshooting
If you encounter any issues with your YUENZEE Smart Ring SY-02, please refer to the following common solutions:
- Device Not Connecting:
- Ensure Bluetooth is enabled on your smartphone.
- Check if the ring is sufficiently charged.
- Restart both your smartphone and the RWFIT app.
- Try re-pairing the device through the RWFIT app's "My Devices" section.
- Inaccurate Data:
- Ensure the ring is worn snugly on your finger. A loose fit can affect sensor readings.
- Clean the sensor area on the inside of the ring.
- Calibrate the device through the app if a calibration option is available.
- App Not Responding:
- Close and reopen the RWFIT app.
- Check for app updates in your smartphone's app store.
- Ensure your smartphone's operating system is up to date.
- Short Battery Life:
- Ensure the ring is fully charged.
- Reduce the frequency of real-time monitoring if possible, as continuous data collection consumes more power.
- Check for any background apps on your phone that might be excessively communicating with the ring.
If the problem persists, please contact YUENZEE customer support for further assistance.
6. Specifications

Image 8: A table summarizing the YUENZEE Smart Ring SY-02's key specifications and available sizes.
| Feature | Detail |
|---|---|
| Brand | YUENZEE |
| Model Number | YZ-006.2B |
| Color | Black (other colors may be available) |
| Material | Stainless Steel + Epoxy Resin |
| Weight | Approx. 3.3g (ring) / 112g (package) |
| Connectivity | Bluetooth ver 5.2 |
| Water Resistance | IP68 + 5ATM (Max 50m) |
| Battery Type | Lithium Polymer |
| Battery Capacity | 15-18 mAh |
| Charging Time | Approx. 1.5 hours |
| Continuous Use Time | Up to 1 week (approx. 5 days typical use) |
| Compatible OS | Android 5.1~ / iOS 8.0~ |
| Other Functions | Gesture Control |
| Included Accessories | USB-C Cable, User Manual, Charging Cable |
6.1. Sizing Information
The YUENZEE Smart Ring SY-02 is available in various sizes to ensure a comfortable and accurate fit.
| Size | Inner Diameter (mm) | Circumference (mm) |
|---|---|---|
| #7 | 17.4mm | 54.3mm |
| #9 | 19.0mm | 59.6mm |
Note: This product is not a medical device. It is intended for general health management and reference purposes only.
7. Warranty and Support
For warranty information and customer support, please refer to the documentation included with your product or visit the official YUENZEE website.
If you require assistance with setup, operation, or troubleshooting that is not covered in this manual, please contact YUENZEE customer service.